Binder and cutter mechanism



J1me 1962. J. B. JACKSON BINDER AND CUTTER MECHANISM Filed Feb. 8, 1960 n n .4 W 4 m 2 1N VEN TOR. JOSEPH 5, JA OKSON.

3,637,531 BlNDER AND CUTTER MECHANISM Joseph B. Jackson, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Filed Feb. 8, 1960, Scr. No. 7,475 3 Claims. (Cl. 139-263) This invention relates to looms for weaving, and, particularly, to a cutter and binder mechanism for the filling thread in shuttleless looms.

It is the general object of the invention to eliminate undue wear upon the parts of a cutter and binder mechanism thereby increasing the useful life of that unit.

It is a further object to improve the operation of a cutter and binder assembly of the type having a relatively large contact area between a movable cutter and binder and stationary ledger and binder members.

More specifically, it is an object of the invention to provide equal pressures all along the contact areas between the movable and stationary parts of a cutter and binder assembly, the absence of which in some of the prior art constructions resulted in uneven and unnecessary wear of the relatively movable parts with the result that the unit no longer functioned properly and required frequent adjustment.

Recently issued United States Patent No. 2,921,611 relates to a cutter and binder assembly of the type with which the present invention is concerned and comprises a reciprocable plate-like cutter and binder blade which functions between cutter and binder plates arranged side by side in opposed spaced relation on a fixed supporting member and pressed toward engagement with the reciprocable cutter and binder blade. A torsion coil spring both urges the reciprocable blade toward one of its extreme positions and also applies a torsional force to bias the blade toward the ledger member. According to that patent the contact between the movable blade and the stationary ledger and binder members extended over a substantial distance. A single adjustment screw applied pressure at approximately the midpoint of that distance upon a spring member which in turn bore directly upon the binder plate. Due to the large expanse of contact between the binder and cutter parts to be controlled by the single adjustment screw, an even application of pressure all along that expanse was diificult to achieve with the result that if insufiicient pressure were applied, then no cutting would take place. On the other hand, if too much pressure were applied, then rapid wear of the parts would result or possibly a cutting action would result at both edges of the reciprocable blade instead of cutting at one edge and binding at the other. As the wear progressed sufficiently, the assembly Would-not function properly due to the resultant insufiicient pressure between the blade and its cooperat ing members.

According to the present invention all of the abovementioned diificulties have been overcome by providing a dual adjustment over the width of the flat pressure spring bearing against the binder plate member and preferably by further subdividing these two into two pairs of adjacent sections by slotting them lengthwise, and controlling the pressure to be applied by each pair by means of a separate adjustment. In this manner the acquirement of the proper pressures between the parts is quickly and easily obtainable.

Further objects and advantages will be apparent from the description which follows.

In the drawings:

FIG. 1 is a side elevational view of the binder and cutter assembly and is shown as being inverted in that the bottom of the figure is actually the top of the assembly in use;

3,037,531 Patented June 5, 1962 FIG. 2 is a top plan view of the assembly as seen looking upwardly from the bottom of FIG. 1;

FIG. 3 is a fragmentary bottom plan view taken substantially on the line 3-3 of FIG. 2 looking in the direction of the arrows and showing the movable binder and cutter blade in closed shearing position;

FIG. 4 is a pictorial view of the cross head with the movable blade attached;

FIG. 5 is a side elevational view of the stationary members which cooperate with the movable blade to eifect binding and cutting;

FIG. 6 is a view, partly in section, as seen from the bottom of FIG. 5; and

FIG. 7 is a view of a portion of the structure of FIG. 1.

Now referring to FIGS. 1 and 2 of the drawings, the arrow 11 generally designates the binder and cutter portion of the assembly constructed in accordance with the invention and as there shown comprises a movable or reciprocable binder and cutter blade 12 Which is mounted on an elongated arm or bracket 13 having an outwardly flared arm portion 14 which is suitably adapted for attachment by bolts or screws to the side of a casing that forms the lower support member for a cam and tappet mechanism of a filling motion all of which is not shown but which may be similar to that disclosed in United States Patent No. 2,604,123. The arm 13 has cast, or otherwise formed as a part thereof at two spaced locations along its longitudinal extent the elongated side lugs 15 and 16 which project outwardly from the arm 13 and in parallel relation to each other and which have axially aligned circular bearing holes in which is reciprocably mounted a rod 17 having a reduced end portion 18. The rod is actuated to reciprocate in one direction to the dotted line position of FIG. 1 by means of a suitable cam and tappet mechanism (not shown), such as in the above-mentioned patent, and it is moved in the opposite direction to the solid line position of FIG. 1 by means of the combination expansion and torsion coil spring 19 whose inner diameter is larger than the rod diameter so that the spring encircles the rod in spaced relation thereto as noted in the figures of drawing. One end of the spring is threaded upon a reduced diameter portion of a collar 20 which portion has been provided with appropriate threads for that purpose. The opposite side of the collar has a further reduced portion 21 which is press fitted into the bearing hole in the lug 15. The axial opening in that collar thereby acts as a bearing for the rod which is reciprocable therein. The opposite end of the spring is similarly threaded on a reduced diameter portion of a second collar 23 which is fixed to the rod by means of a set screw 24, FIGS. 1 and 2. The collar 23 is adjustably located in a desired position on the rod and prior to tightening of the set screw the collar 23 and that end of the spring are rod for a reason to be described.

The reduced end portion 18 of the rod has mounted thereon a crosshead 25 formed with a sleeve-like hub 26 which is firmly clamped against the shoulder formed at the junction of this reduced portion with the main body of the rod by a lock Washer 27 and nut 28. As noted in FIGS. 1 and 4 the hub has integral therewith and adjacent one end thereof two oppositely projecting arms 29 respectively, to the inner flat surface of the projection 35. The length of the shoulder portions of these bolts is such as to permit free but limited sliding or floating movement of the cutter blade thereon enabling the latter to align itself automatically laterally and vertically with respect to a stationary cooperating ledger blade to be described, whereby their interfaces will align themselves in a flush manner so that proper and effective shearing action will be assured. Preferably, the openings in the blade are considerably larger than the shoulders of the bolts over which they fit in order to give added adaptation to alignment.

The stationary part of the cooperating binder and cutter members is attached at one end thereof by a pair of screws 41 to the inner flat side face 42, FIG. 3, of a depending fiat projection 43 integral with the underside of the arm 13, and comprises the above-mentioned ledger blade or plate 40 and a binder plate 44 and fiat spring 45 both of sheet spring steel, FIGS. 5 and 6. As shown, the binder and ledger plates are separated by a member 46 adjacent the attached end so that the movable blade 12 may function in the space therebetweeu. A further spacer 47 separates the spring slightly from the binder plate. Both the binder plate and the adjacent spring are slotted at 48 substantially along the entire length thereof to provide two pairs of adjacent sections 49 and 50, FIGS. 1 and 5. A pair of adjustment screws 51, 52, threaded in an arm 53 extending laterally from the lug 15 and outwardly of the flat spring 45, provide the proper pressure to be applied each to one of the pairs of sections 49 and Lock nuts 54 and 55 maintain any desired setting. An extension 56 on the binder plate acts as a support to direct the filling yarn into the path of the movable blade.

As seen in FIGS. 1 and 2, the lug 15 carries near its free end an upright pivot pin 57 on which is pivotally mounted a two-armed lever 58, one arm 59 of which is formed at its outer end with an enlargement 69 having an arcuate surface 61 which is engaged by the end face 62 of a short bar-like extension 63. This extension may form an integral part of the arm 29 of the cross-head or it may be a separate element as here shown and rigidly atfixed thereto by nut 64 having a threaded connection with a stem portion of the bar 63 that passes through a drilled hole in the arm 29. In either instance, the disposition of the bar is at right angles to arm 29 and also in overlying relation to the rod 17. A tension spring 67 interposed in a tensioned state between the end portion of the arm 59 and bar extension 63 and having its ends secured over upright pins 68 and 69 fixed in extension 63 and end portion of arm 62, respectively, serves to maintain the surfaces 61 and 62 in operative pressure engagement whereby as the cross-head is reciprocated by the rod 17, which itself is aflected at its right hand end (not shown) by the above-mentioned cam and tappet mechanism, corresponding pivotal movements are imparted to the two-armed lever 58.

The splitting of the binder plate and its adjacent flat spring into two sections and the provision of a separate adjustment for each section makes possible a simplified assembly of the binder and cutter mechanism with even pressures being applied all along the contact surfaces between the movable blade and the cooperating ledger and binder plates. After the parts have been assembled, cutting pressure is applied between the ledger and movable blade by applying torsional twist to the spring 19 through the collar 23 and then locking the latter on the rod 17 by means of the set screw 24. The floating mounting of the movable blade permits the ledger and blade to align themselves in a flush manner and to retain that relationship. Then the set screw 52 is tightened against the spring section 50 whose end then bears against the adjacent binder section to maintain the proper pressure between the latter section and movable blade. Similarly, the adjustable screw 51 is then set to apply proper pressure between the binder section 49 and the movable blade. The pressure between the binder and the blade is less than that between the ledger and the blade, so that cutting and binding take place simultaneously. This arrangement eliminates the possibility of the movable blade or the stationary members coming out of proper alignment.

While one embodiment of the invention has been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. This invention is, therefore, not to be limited to the precise details described, but is intended to embrace all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

I claim:

1. In a filling thread binder and cutter for looms having a ledger blade, an opposed binder member, a movable binder and cutter member slidable between said ledger blade and binder member, a reciprocable support means by which said critter and binder member is carried, resilient means for biasing said support means toward one of its extreme positions, said resilient means being further stressed to press said movable blade into shearing contact with said ledger blade, a flat spring member adapted to press said binder member toward said ledger blade, said binder member and spring means being slotted along a substantial portion of the length thereof to provide pairs of adjacent sections, and a separate adjustable means effective upon each section of said spring member for controlling the pressure applied by said latter section against the adjacent section of the binder.

2. In a filling thread binder and cutter for looms having a ledger blade, an opposed binder member mounted at one end in spaced relation to said ledger blade, a movable binder and cutter member slidable between said ledger blade and binder member, a reciprocable support means by which said cutter and binder member is carried in a floating mount, resilient means for biasing said support means into engagement with said ledger blade and binder member, a flat spring member adapted to press said binder member toward said ledger blade, said binder member and spring means being slotted along a substantial portion of the length thereof to provide pairs of adjacent sections in side-by-side relation, and a separate adjustable means for each said pair efiective to control the pressure applied by each spring section against its adjacent binder member section.

3. The structure of claim 2 wherein said binder member and spring means are slotted along a substantial portion of the length thereof to provide two pairs of adjacent sections and wherein said adjustable means comprises a set screw.

Budzyna et a1. Jan. 19, 1960 Gallery et al. Jan. 19, 1960 

